K&N 71-3066 Blackhawk Cold Air Intake UpgradeThe K&N 71-3066 Air Intake fits some Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD models. See vehicle applications link for details.K&N Blackhawk Induction air intake systems are available for select gas trucks, diesel trucks and muscle cars. They feature a black powder coated metal intake tube with a welded K&N engraved plate. K&N Blackhawk air intakes come with a black reusable K&N air filter made with Dryflow synthetic media. K&N Blackhawk air intakes provide excellent airflow for more power and torque while they protect your engine. This Blackhawk Induction Air Intake cannot be sold in California. It is not legal for use in California or other states adopting California emission standards. Check the K&N catalog or website vehicle parts search for specific CARB status.